F. Ramezani

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Let G be a graph of order n and let µ be an eigenvalue of multiplicity m. A star complement for µ in G is an induced subgraph of G of order n − m with no eigenvalue µ. In this paper, we study maximal and regular graphs which have K r,s + tK 1 as a star complement for 1 as the second largest eigenvalue. It turns out that some well known strongly regular(More)
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